A 1000 W heater is used to heat water. How much heat is supplied in 10 minutes?

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Question: A 1000 W heater is used to heat water. How much heat is supplied in 10 minutes? (2020)

Options:

Correct Answer: 600 kJ

Exam Year: 2020

Solution:

Heat (Q) = Power (P) * Time (t) = 1000 W * 600 s = 600 kJ.

A 1000 W heater is used to heat water. How much heat is supplied in 10 minutes? (2020)

A 1000 W heater is used to heat water. How much heat is supplied in 10 minutes? (2020)

Step 1: Understand that the heater has a power of 1000 watts (W).
Step 2: Convert the time from minutes to seconds. Since 10 minutes is equal to 10 * 60 seconds, we calculate 10 * 60 = 600 seconds.
Step 3: Use the formula for heat (Q), which is Q = Power (P) * Time (t).
Step 4: Substitute the values into the formula: Q = 1000 W * 600 s.
Step 5: Calculate the result: 1000 * 600 = 600000 joules (J).
Step 6: Convert joules to kilojoules (kJ) by dividing by 1000. So, 600000 J / 1000 = 600 kJ.

Power and Energy Conversion – Understanding the relationship between power (in watts) and energy (in joules or kilojoules) over time.
Time Conversion – Converting time from minutes to seconds to ensure consistency in units when calculating energy.